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Letters Patent No. 73,302, dated January 14, 1868.

DEVICES FOR STRAINING WIRE IENGES.

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TIO ALL WHOM IT MAY CONOERN:

Beit known that I, F. H. CRANDALL, of Ontario, in the county of Wayne,and State of New York, have invented a certain new and usefulImprovement ia Devices for straining Wire Fence; and I do hereby declarethat the following is a full and exact description thereof, referencebeing had to the accompanying drawings, making part of thisspecitication. I

Figure lis a front elevation of my improved fence.

Figure 2 a perspective view of a. modification of the same.

Figure 3 a perspective view of one of the straining-devices detached.

Like letters of reference indicate corresponding parts in all thefigures.

My invention consists in a device for straining wire fence, consistingof a bolt having a lscrew-thread cut upon one end for screwing into thepost, and eyes formed in the body for the connection ot' the ends of thewire, and a socket, 0r a square head, or some equivalent arrangement,for fitting the instrument that turns the bolt, all as hereinafterdescribed.

As represented in the drawings, A A are posts' connected by suitablebraces or stiii'eners a a, and B B are the panels or sections oi fenceconnected with the posts.- Fig. 1 represents a fence that is made byweaving the pickets Z7 b in strands of wire c e, that are crossedalternately to bind the pickets. Fig. 2 represents vsimply wire lengths,which form the panels or sections, without pickets7 being stretchedlengthwise. My improved device is capable t" attaching to either form.The wires are rigidly attached at one end, as shown at d. The oppositeends are passed through eyes ff of bolts O C. Each bolt is madestraight, of suitable length, and has a screw-thread, g, out upon itsend, which screws into the post. It also has a socket, 7L, for theinsertion of a lever to turn the bolt, or the end is made square, asshowuat the top in fig.1,for the application of a wrench, or someequivalent arrangement is employedk whereby the bolt may be easilyturned.

The operation will be readily understood. The threaded portion of thebolts is screwed into the side of the post, leaving the ends projecting,with the wires fastened in the eyes. `Wl1enever it is desired to strainor tighten the wires, the bolts are turned inward, and when it isdesired to unstrain or loosen them, the bolts are turned in the reversedirection. By this means, I am enabled to compensate for contraction andexpansion, caused by the difference in the temperature in winter andsummer, which obviates one of the greatest difficulties in the wireAfence. It will be seen that the adhesion of the threaded part of thebolt to the fibres of the wood is suicient to prevent its turning underthe ordinary tension of the wires, and thus they are kept taut, but whengreat contraction is produced by severe cold, the force acts to unscrewthe bolt suiciently to prevent the breaking of the wires. Thus, by meansof the screw-thread, a connection is formed with the side of the post,that can be relied onto maintain proper tension, and yet beself-adjusting under great variations of temperature, and this devicesecures the great advantage of having the connection entirely outside ofthe post, where theI wire can be applied with greater rapidity, and muchless cost, than when entering or passing through holes in the posts forthe same purpose. 'lhey also take up the slack from sagging or thestretching of the wires. This e'ect is of much value, especially inconnection with the woven pickets, as in fig. 1, for it enables thepickets to be tightened up when they become loose. t

By the employment of the bolts C, I am enabled to'connect with anyordinary post, which is far better than would be if the post had to beespecially formed for the attachment'ot` the straining-device, and thisdevice itself of la complicated nature.' My bolts are of the simplest,cheapest, and most effective form, and have siin ply to be screwed intothe post.

What I claim as my invention, and desire to secure by Letters Patent,is-

The threaded bolt C, constructed, arranged, and applied substantially inthe manner and for the purposes herein set" forth.

. In witness whereof, I have hereunto signed my name in the presence oftwo subscribing witnesses.

` F. H. CRANDALL.

Witnesses:

J. A. Davis, R. F. OsGoon.

